Rail fastening



June 16, 1936. R AFF ENBEU; 2,044,446

RAIL FASTENING Filed Nov. 25, 1954 2 Sheets-Sheet 1 RUDOLF RAFFLENBEUL INVENTOR ATTORNEYS Jun 16, 1936. R. RAFFLENBEUL 2,044,446

mm a g RAIL FASTENING Filed NOV. 25, 1934 2 Sheets-Sheet 2 RUDOLF RAFFLENBEUL INVENTOR ATTORNEY .5

Patented June 16, 1936 RAIL FASTENING Rudolf Raiflenbeul, Hagen-Vorhalle, Germany Application November 23, 1934, Serial No. 754,389 In Germany February 8, 1934 9 Claims.

This invention relates to means for fastening rails on sleepers, wherein use is made in particular of bearing plates with rail-guiding ribs, in which a clamping member for firmly clamping the foot of the rail is held.

In a rail fastening of this type, it is known to use wedge-shaped clamping members supported against the upper side of the foot of the rail and an undercut portion of the rib, and adapted to be driven out away from the web of the rail at right angles to the longitudinal axis of the rail by screws. In such a method of fastening, the ribs of bearing plates or sleepers have already been constructed as hooks, but it has been necessary for these hooks to have an excessive height in order to allow the insertion of the rail from above. These hook-shaped ribs would, therefore, be subjected in an extremely unfavourable manner to bending strain owing to their great height.

Furthermore, it is known to secure rails to ribbed bearing plates by means of clamping wedges which are driven through recesses in the ribs at right angles to the longitudinal axis of the rail from the web of the rail and lie with the thick end on the foot of the rail.

According to the invention, in the case of the rail fastening first described, the ribs are constructed as hooks composed of two projections separated by an upstanding slot. The clamping 30 member has a centre holding arm serving as a guide, which rests by means of a lip on the bearing plate and is provided with a screw-thread and a nut at the end remote from the rail.

The wedge clamping member according to the invention may be made as wide as desired and permits of providing a large surface of engagement with the foot of the rail. The wedge clamping member may be conveniently and rapidly in troduced into the bearing projections by pushing in from the side of the web of the rail, and produces a favourable initial tensioning of the rail when lightly forced in. This tensioning is then made sure by simply tightening the nut on the outer screw-threaded end of the centre holding arm of the wedge clamping member. The tensioning may also be rendered more secure preferably by the provision of a resilient washer under the nut, whereby a loosening of the nut is reliably prevented and at the same time certain slight variations in the position of the wedge surface with respect to the rail foot in the railway operation are compensated.

By the novel construction of the wedge clamping member, it is brought about that shocks emanating from the foot of the rail during opaccording to the invention are illustrated by way of example in the accompanying drawings, where- Figure 1 shows the rail and the fastening in section, partly in elevation,

Figure 2 is a plan of the arrangement according to Figure 1, partly in section on the line II-II of Figure 1,

Figure 3 is a section on the line IIIIII of Figure 1, viewed in the direction of the arrows, the rails and the wedge clamping member being omitted,

Figures 4a, 4b and 40 show, in detail, the wedge clamping member in a. view from below, in side elevation and in plan, while Figures 5 and 6 are a side elevation and a transverse view, seen from the web of the rail, of differently constructed bearing projections.

The bearing plate I, which is mounted in any desired manner on an iron or wood sleeper, for example by means of the usual bolts, carries on either side of the railfoot a pair of bearing projections 2, which are separated by a slot 3 extending to the bearing plate I and have recesses 4 opening in the direction of the rail. The upper surfaces of the recesses 4 are arranged obliquely to correspond to the upper The wedge 5, which has wedge surface.

an inclined surface 5 falling in the outward direction on its upper side, fitsinto the recesses 4 of the two bearing projections 2. and has on its lower side roughened engagement sur out into a horizontal surfa 1 extends in the manner over the wedge 5 and carries a The wedge 5 has a centre holding arm 1 a preferably fluted or face 8, which may run ce 9. The centre arm of a rib transversely lip I0 serving as a guide and a support on the bearing plate. The centre arm 1 runs out into a bolt portion l I, which is provided with a nut l2 silient arched washer l3.

and, if required, a re- Aiter the fitting of the rail between the pairs of bearing projections 2 arranged on both sides, the

wedge 5 is introduced into the recesses 4 of the projections 2 by being pushed in from the side of the rail and then tensi the nut 12 on the bolt ll.

oned by tightening of The resilient washer I3 is given so much initial tension upon the tightening of the nut l2 that it alone absorbs the shocks which otherwise have the effect of loosening the nut, and destroys them by its natural resiliency.

In the construction shown in Figures 5 and 6, the bearing projections 2 are rounded off on their upper side and in section.

1. A rail fastening comprising a base with upstanding projections, recesses in said projections facing the rail, wedge-shaped clamping members adapted to engage in said recesses and to bear against the foot of the rail, upstanding open slots subdividing said projections, arms on the clamping members adapted to lie in said slots, screw-threaded extensions on the outer ends of said arms arranged to extend beyond the upstanding slots and nuts on said extensions adapted to co-operate with the outer faces of the upstanding projections to draw the clamping members into their recesses and hold them tightly against the foot of the rail.

2. A rail fastening comprising a base with an upstanding rib on each side of the rail, a wedgeshaped clamping member bearing against the upper face of the foot of the rail and an undercut portion of the rib, an upstanding open slot subdividing each rib transversely across the same and across the undercut portion, a central arm on the clamping member adapted to lie in the vertical slot of the rib and provided with a screwthreaded portion and a nut screwed on said threaded portion and adapted to co-operate with the outer surface of the rib to hold the clamping member firmly in clamping position.

3. A rail fastening comprising a base with upstanding hook-shaped ribs and wedge-shaped clamping members co-operating therewith to clamp the foot of the rail to the base, said ribs being provided on the side facing the rail with undercut portions having sloping upper surfaces and substantially horizontal lower clearance surface portions, open vertical slots transversely subdividing the ribs and disposed transversely to the undercut portions, arms on the clamping members adapted to lie in said vertical slots and overlie the lower clearance surface portions of said ribs while clearing the same, screw-threaded extensions on said arms and nuts threaded on said extensions to co-operate with the outer surface of the ribs to hold the clamping members in clamping-position, and upper sloping portions upon said clamping members adapted to cooperate with said undercut portions of said ribs.

4. A rail fastening comprising a base with an upstanding rib having an undercut portion on the side facing the rail, a wedge-shaped clamping member adapted to engage the upper wall of said undercut portion and having a part of its under surface shaped to coincide with the upper surface of the rail foot, an open vertical slot transversely subdividing the rib and running transversely to the undercut portion, and an arm on the clamping member adapted to lie .in the vertical slot and to be held in clamping position by a nut screwed on a screw-threaded extension and co-operating with a face of the rib.

5. A rail fastening comprising a base with an upstanding rib having an undercut portion facing the rail, a wedge-shaped clamping member adapted to engage said undercut. portion and the foot of the rail, a slot in the rib running transversely to the undercut portion and extending to the base plate, an arm on the clamping member in the form of a web extending over the upper surface thereof and downwardly over the rear surface to form a lip projecting into the transverse slot in the rib, a screw-threaded projection at the rear of the arm and a nut on said projection adapted to co-operate with the rear surface of the rib to secure the clamping member in clamping position.

6. A rail fastening comprising a base with an upstanding rib having an undercut portion, a

wedge-shaped clamping member adapted to cooperate with said undercut portion to clamp the foot of the rail to the base, a transverse slot in the rib, an arm on the clamping member adapted to lie in the transverse slot and having a screw-threaded extension adapted to project beyond the rear of the slot, a. nut threaded on said extension to co-operate with the rear surface of the rib to secure the clamping member in clamping position and a spring washer interposed between said nut and said surface of the rib to take up shocks transmitted through the foot of the rail.

'7. A rail fastening comprising a base plate with an upstanding rib having an undercut portion on the side facing the rail and a vertical slot arranged transversely to said undercut portion, a wedge-shaped clamping member adapted to engage in said undercut portion and having a roughened under surface adapted to engage the upper surface of the foot of the rail to clamp the rail to the base, a web extending transversely across the top of the clamping member and having a rearwardly and. downwardly extending wing portion adapted to lie in the transverse slot in the rib, a threaded extension at the rear of the wing portion and a nut on said threaded extension adapted to co-operate with the rear surface of the rib to hold the clamping member in operative position.

8. A rail fastening comprising a base with an upstanding rib having an undercut portion on the side facing the rail, a wedge-shaped clamping member adapted to co-operate with the undercut portion to clamp the foot of the rail to the base, a transverse slot in the rib, an arm on the clamping member adapted to lie in the transverse slot and having a screw-threaded extension adapted to project beyond the rear of the slot and a nut threaded on said screw-threaded extension to co-operate with the rear surface of the rib on each side of the vertical slot to secure the clamping member in operative position.

9. A wedge-shaped clamping member for fastening rails to a base, provided with a web extending transversely across the top of the clamping member at its side remote from the rail, said web having a rearwardly and downwardly extending guiding wing portion and a threaded extension at the rear of the saidwing portion, adapted to receive a fastening nut.

RUDQIF RAFFLENBEUL. 

